Looks like JC forgot to overwrite the solution copy-pasted from the previous episode.

This is indeed what happened; thanks are due to Jen for snagging the discrepancy. Not sure what else I can do to guarantee 100% accuracy and immediate availability of recaps upon completion of their broadcast, but I have now started noting the contestants' solutions in duplicate, both on the wiki and in an offline document. The first solution looks most plausible, but I'll leave the question marks on the wiki for now until/unless someone has a transcribed copy.